Burkert Type 2000 - Manual (Page 10)

10
Structure and function
7. STRUCTURE AND FUNCTION
7.1. Structure
The angle seat valve consists of a pneumatically actuated piston
actuator with optical position indicator and a 2/2-way valve housing.
7.2. Function
Depending on the version, the valve is closed against the medium
flow by spring force (control function A, SFA) or by control pressure
(control function B, SFB).
Spring force (SFA) or pneumatic control pressure (SFB) generates
the closing force on the pendulum disc. The force is transferred via a
spindle which is connected to the actuator piston.
Flow inlet under seat:
As the medium pressure is under the pendulum disc, this pressure con-
tributes to the opening of the valve. The flow inlet is under the valve seat.
If the minimum control pressure is too low for SFB or the permitted
medium pressure is exceeded, leaks may occur!
7.2.1. Control functions
Control function A (SFA)
Closed in rest position by spring force.
Control function B (SFB)
Open in rest position by spring force.
8. ASSEMBLY
8.1. Safety instructions
DANGER!
Risk of injury from high pressure in the system!
• Turn off the pressure and vent the lines before loosening lines
or valves.
WARNING!
Risk of injury from improper assembly!
• Installation must only be carried out by authorized technicians
and with the appropriate tools!
Risk of injury from unintentional activation of the system and
uncontrolled restart!
• Secure system from unintentional activation.
• Following assembly, ensure a controlled restart.
Risk of crushing from moving pneumatic connection!
• When opening and closing the device, do not touch the moving
pneumatic connection.
• Do not reach into the area immediately above and below the
control air connection.
english
Type 2000 INOX